Carbureter.



H. A. MILLER & C. J. CADWELL.

CARBURETER.

APPLICATION FILED MAY 4, I914.

Jan. 23, 1917.

Patented 2 SHEETS-SHEET l.

H. A. MILLER & C. J. CADWELL CARBURETER.

APPLICATION FILED MAY 4, 1914.

Patented Jan. 23, 1917.

2 SHEETS-SHEET 2.

a'ri Alt HARRY A. MILLER, 015 LOS ANGELES, AND ULARENCE J. CADWELL, OF SANTA BARBARA,

CALIFORNIA, ASSIGNORS, BY MESNE ASSIGNMENTS, T MASTER CARBUJRETOR COB.- lOHATION, 0F DETROIT, MICHIGAN, A CORPORATION OF DELAWE.

GARJBURETER.

' Specification of Letters Patent.

Patented Jan. 23, 191W.

Application filed. May 4:, 1914. Serial No. 836,150.

To all whom it may concern Be it known that we, HARRY A. MILLER and Crfilnnivon J. CADW LL, both citizens of the United States, residing at L Angeles,

in the county of Los Angeles and State of California,'and atrSanta Barbara, in the county of Santa Barbara and State of California, have invented anew and useful Carbureter, of whichthe following is a specification.

This invention relates to a carburetor, and one of the main objects of the invention is to provide a novel form of distributor, which is of cylindrical construction and provided with a series of small discharge orifices, which are adapted to be consecutively opened by adjusting the position of the distributer and to thereby regulate the amount of fuel discharged therefrom.

Another object is to provide for, a cylindrical construction of as many of the parts as possible in order to enable them to be economically produced on a turret lathe, and to provide a concentric arrangement of the various parts as much as possible to simplify the construction and produce a uniformity in the internal passages to avoid abrupt angles and air currents.

Another object is to provide an air valve concentric of the distributor and operable to control the supply of air and to also directly control the passage of fuel through the distributer.

Another object is to mount the carbureting chamber and its valves revolubly with respect to the float chamber, thereby enabling the fuel in the fitting float chamber to be set at the angle most convenient for attachment to the fuel pipe and permitting the carbureting chamber and parts carried thereby to be placed in the angle most convenient for attachment to the motor.

Another object is to revolubly attach the air inlet chamber to the carbureting chamber to permit the air in the chamber to be readily adjusted into the desired angular position without disturbing the position of the carbureter as a whole.

Referring to the drawings: Figure 1 is a plan view-.5: Fig. 2 is a side iriew. Fig. 3 is an end elevation. Fig. 4: is a plan view with the mixing chamber, throttle valve, and

air valve removed. Fig. 5 is a section on line m m Fig. 3. Fig. 6 is a plan view of the air inlet chamber. Fig. 7 is a cross section on line ca -1r, Fig. 6.

The float chamber comprises a barrel-1 which is formed preferably integral with a side barrel 2, the barrel 1 having a cap 3 at its upper end and an integral bottom l, into which is screwed the upper end of a nipple 5, which has a longitudinal passage 6 and a valve seat 7 and a transverse passage 8, which communicates with the upper portion of a subchamber 9 above a screen 10. A hollow plug 11 is screwed to the lower end of the nipple 5 and retains the subchamher 9 in position.

12 is an inlet socket for the subchamber, and fuel enters therethrough into the subchamber and passes up through the screen 10 and through the transverse passage 8 into the hollow nipple 5, and thence upward into the float chamber 1, its. passage into the float chamber bein controlled by a vertical needle valve 13, w ich cooperates with seat 7, and has a grooved collar 1 1, which engages pivoted arms 15, which are in turn controlled by a float 16, whereby the level of fuel in the float chamber through,

the medium of the float 16 and arms 15 controls the position of the needle valve 13, and thus regulates the level of liquid therein. By removing the nut 11 and lifting the needle valve, the float chamber may be quickly drained.

17 designates a. barrel of the carburetor, which is revolubly connected with the barrel 2, and at itsupper end is provided with a suitable flange 18 for connection to the inlet manifold, not shown. The barrel 17 is provided with an annular normal air chamber 18. Swiveled on the lower end of the barrel 2 is an inlet air chamber 19, which is divided by a partition 20 to form a normal air chamber in the passage 21, which merges with a circular air groove 22, which communicates with an annular air chamber 23, in the barrel 2, the air chamber 23 combe drained, and screwed into the arm 26 is a hollow vertical distributer stem 28. Slidable on the stem 28 is a cylindrical distributer 29 having a closed top 30, and with lateral perforations 31 for the discharge of fuel, Which are located at different elevations. Slidably mounted on the' distributer 29 is a conical air valve 32 having an underout groove 33 in its upper face, which isengaged by the outwardly bent ends 34 of a bail 35, which is pivotally connected to a throttle valve 36 mounted on a shaft 37 in the mixing chamber 38, the walls of the mixing chamber being concave arcportions of a sphere having a greater radius than the radius of the throttle valve 36 to produce a more gradual closing action of the throttle valve as it approaches a shut-off position than if the Walls of the mixing chamber were straight. A by-pass38' around the throttle valve 36, and the amount of fuel permitted to pass therethrough is regulated by an adjusting screw 39., A by pass 40 is arranged on the opposite side and communicates with the annular normal air chamber 18' and a thumb screw 41 is provided for regulating the amount of normal air permitted to pass in this manner into the mixing chamber 38. The air valve 32 has a sleeve 42, the upper rim of which acts as a valve to shut off or open the perforations 31 according to the relative position of the air valve and distributer.

As shown in Fig. 4, the barrel 2 is split at 43, and a screw 44 is provided to contract same and grip the barrel tightly on the barrel 17 to hold the parts rigidly at the desired relative angle. In loosening the screw 44, the parts may easily be adjusted to any angle desired. The lower end of the distributer 29 has pins 45, which are engaged by a forked arm 46 secured adjustably by screw 47 to a shaft 48, the outer end of which has an arm 49 towhich is connected a wire 50 for adjusting it; The throttle shaft 37 is provided with an arm 51 for controlling it.

l/Vhen the parts stand in the position shown in Fig. 5, the throttle valve is closed and the air valve 32 is moved into its upper position entirely closing oif the auxiliary air chamber and practically closing the annular normal air chamber 19 except for a slight space and entirely closing all of the perforations 31 in the distributer so that the suction is exerted through the by-pass 38, and this is supplied from the by-pass 40, but no fuel is permittedto enter the mixing chamber as the fuelpassages 31 are all closed. This position of the parts is advantageous is arranged when coastin and it is desired to prevent escapement 0 fuel, none at this time being required for operating the motor. For starting the motor, the distributer may be elevated to uncover one or more of the perforations 31, any fuel which may drop into the raised upper portion of valve 32 being lifted therefrom upon suction being established in starting, and the throttle valve is opened the desired amount to permit the normal air to'flow from the passage 18 into the mixing chamber 38 and combined therein with the liquid fuel. After starting to increase the speed of the motor, the throttle valve 36 may be opened, and this will move down the air valve 32, which will admit open more of'the perforations 31. Thus, the

.adjusting of the throttle 36 will act to distributer 29 up or down, or to shut the same entirely olf, by moving the distributer 29 down to lowest position. When maximum power is required as for racing, the throttle will be adjusted wide open, which will move the air valve 32 into the lowest position, and the distributer 29 may be adjusted to its highest elevation or at any intermediate point so that all or less of the perforations 31 may be uncovered and the maximum flow of liquid fuel and air is permitted. By shutting off the throttle all of the perforations 31 except one of them will be shut off and this single perforation will supply suflicient fuel to keep the motor turning over, for this purpose, the air being sufiicient, which is furnished through the bypass 40, suction being exerted through bypass 38- I What we claim is:

1. In a carbureter, a mixing chamber, an auxiliary air valve for controlling admission of air to said chamber, a distributer slidable within the air valve and having a series of perforations which are adapted to be opened or shut by the air valve accord ing to the relative positions of the air valve and distributer and a throttle valve positioned above the mixing chamber and opera tively connected to the air valve.

2. In a carbureter, a mixing chamber, an auxiliary air'valve for controlling admission of air to said chamber, a distributer slidable within the air valve and having a series of perforations which are adapted to be opened or shut by the air valve according to the relative positions of the air valve and distributer, a throttle valve above the mixing chamber, an operating member pivoted to the throttle and air valve.

3. Ina carbureter, a mixing chamber, an auxiliary air valve for controlling admission auxiliary air from chamber 25, and will of air to said chamber, a distributer slidable within the air valveand having a series of perforations which are adapted to be opened or shut the air valve according to the relative psitions of the air valve and distributer, and means for sliding the air valve along the distributer.

d. In a carbureter, a mixing chamber, an auxiliary air valve for controlling admission of air to said chamber, a distributer slidable within the air valve and having a series of perforations which are adapted to be opened or shut by the air valve according to the relative positions of the air valve and distributer, means for sliding the air valve along the distributer, and means for sliding the distributer independently of the air valve.

In a carbureter, a mixing chamber, an auxiliary air valve for controlling admission of air to said chamber, a distributer slidable within the air valve and having a series of perforations which are adapted to be opened or shut by the air valve according to the relative positions of the air valve and distributer, a throttle valve above the mixing chamber, a connection between the throttle valve and air valve to produce cooperative connection of the throttle valve and air valve, and means for sliding the distributer independently of the air valve.

6. In a carbureter, mixing chamber, an annular normal air chamber for admitting air thereto, an auxiliary air' chamber within and concentric with the normal air chamber, a distiiiibuter for supplying liquid fuel to the mixing chamber, and an auxiliary air valve for controlling the admission of auxiliary air to the mixing chamber, said air valve adapted to control the opening of the normal air chamber, the wall of the carbureter having a by-pass from the annular normal air-chamber to a point in the mixing chamber above the annular opening of the normal air chamber in the mixing cham- 7. In a carbureter, a mixing chamber, an auxiliary air chamber below the mixing chamber, an annular normal air chamber surrounding the auxiliary air chamber and discharging into the mixing chamber, a conical auxiliary air valve slidable in the auxiliary air chamber for controlling the admission of air from that chamber to the mixing chamber, and a distributer within the auxiliary air valve in slidable relation there to, and provided with a series of perforations controlled by the relative position between the distributer and air valve.

8. In a carbureter, a mixing chamber, an

chamber for controlling the admission of air from that chamber to the mixing chamber, a distributer within the auxiliary air valve in slidable relation thereto, and provided with a series of perforations con trolled by the relative position between the distributer and air valve, a hollow stationary distributer stem upon which the distributer is slidable for delivering fuel to the distributer, a float chamber, and means for conducting fuel from the float chamber to said stem.

9. In a carbureter, a mixing chamber, an auxiliary air chamber below the mixing chamber, a normal air chamber surrounding the auxiliary air chamber and discharging into the mixing chamber, a conical auxiliary air valve slidable in the auxiliary air chamber for controlling the admission of air from that chamber to the mixing chamber, a distributer within the auxiliary air valve in slidable relation thereto, and provided with a series of perforations controlled by the relative position between the distributer and air valve, said air valve having an undercut recess in its upper surface, a bail, the ends of which engage in the undercut recess, a throttle valve above the mixing chamber, the upper end of the bail being connected to the throttle valve.

10. In a carbureter, a barrel, a liquid distributer therein, an auxiliary air chamber in the barrel, a normal air chamber in the barrel surrounding the auxiliary air chamber, an inlet air chamber swiveled on the lower end of said barrel, said auxiliary air chamher having a partition forming a normal air passage therein communicating with the annular normal air passage of the barrel, and an auxiliary air passage therein communieating with the auxiliary air passage of the barrel. I

11. In a carbureter, a cylindrical distributer provided with a series of perforations in its wall, means for introducing liquid fuel to the distributer, means for opening and closing said perforations, a throttle valve, said means being connected with the throttle valve for a simultaneous adjustment therewith, the wall of the carbureter having a by-pass formed from the mixing chamber to a point above the throttle valve to permit the passage of a small amount of air around the throttle valve when it is closed, and an adjusting screw for regulating the flow of air through said by-pass.

12. In a carbureter, a mixing chamber, an annular normal air chamber below the mixing chamber, an auxiliary air chamber within tbpawnormal air chamber, an auxiliary air valve for controlling the passage of air from saidair chambers to the mixing chamber, the wall of the carbureter having a by-pass extending from said annular normal air chamber into the mixing chamber at a point above said air valve, and an adjusting screw forregulating the passage of air through said by-pass.

13. A carburetor comprising a mixing chamber, a fuel distributer in said chamber and having a series of discharge perforations therein, a throttle valve above the distributer, an air valve slidable upon the dis-.

tributer and controlling the passage of air into the mixing chamber and normally closing the perforations in the distributer, and a connection between the air valve and throttle valve whereby when the latter is opened the air valve opens and uncovers the perforations in the distributer.

14. In a carburet e r, admixing chamber, an annular normal air chamber for admitting air to the mixing chamber, an auxiliary air chamber within and concentric with the normal air chamber, a distributer for supplying liquid fuel to the mixing chamber and having discharge perforations therein, and an air valve controlling the admission of auxiliary air to the mixing chamber and air from the normal air chamber into the mixing chamber, said valve being mounted upon and adapted to open and close the perforations in the distributor.

15. In a carbureter, a mixing chamber, an

annular normal air chamber for admitting HARRY A. MILLER. C. J. CADWELL.

In presence of Gno. T. HACKLEY, LORRAINE E. DURROW. 

